Graffiti artist KET has selected 38 influential and pioneering urban artists from around the world. Alongside selections of their artwork, KET explores their mediums, methods and backgrounds, and why they have chosen to challenge classical ideas of art to convey messages about urban culture.

From well-known names such as Banksy, Shepard Fairey and Blek le Rat to stars of the underground movement, these are artists who have moved far away from graffiti lettering and tags to develop individual styles that reflect and critique modern life.